You won't be disapointed by the cert. I've been to literally dozens of these and i enjoy them all. the lectures never get old to me, I learn something new everytime. I say enjoy the workouts... if you've never trained with a big group it will be thrilling. The attendees and the trainers are top notch, there is a reason why these certs are so popular... it's an excellent weekend.
as for your training... your more than ready... you can never really be ready.